A discussion in fall 2010 considered the extent to which purely software-related questions would be welcome on this site. It didn't really reach a conclusion, but one useful suggestion that arose is to collect a set of links to online support resources (such as user groups and list servers) for the various statistical computing platforms. I guess that would let us close some of these questions in a constructive and relatively guilt-free manner. I, for one, would like to help the people who come by with questions about SAS macro syntax or table access, even though these questions have no direct statistical interest (and would interest only small subcommunities here) and therefore ought to be closed or migrated.
Could we organize replies in the present thread by software platform? The ones of most immediate use are those that keep showing up: R, SAS, SPSS, Stata, Excel.